| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an injection method for a cement-based injection material, enabling the injection of cement particles in a wide range while inhibiting the usage amount of extremely-superfine-particle cement. <P>SOLUTION: An injection port is inserted into a predetermined site on a ground to be reinforced. Subsequently, an extremely-superfine-particle cement-based injection material having an average particle size of 1-3 μm is precedingly injected from the injection port. Then, a superfine-particle cement-based injection material having an average particle size of 3-5 μm is followingly injected from the injection port. In this way, extremely-superfine-particle cement-based injection material is injected over a long distance from the injection port and the superfine-particle cement-based injection material is injected over a short distance from the injection port. <P>COPYRIGHT: (C)2012,JPO&INPIT |
